miercuri, 6 mai 2015

O noua lentila prime 50mm STM de la Canon

Au aparut specificatiile pentru noua lentila prime 50mm F/1.8 STM de la Canon:
  •  lentila este construita din 6 elemente in 5 grupuri; 
  • diafragma maxima F/1.8, constructie din 7 elemente rotunjite (bokeh placut);
  • va fi compatibila Full-frame;
  • STM/Stepping motor silentios - un mare avantaj pentru filmare DSLR daca folositi aparate compatibile cu aceasta functie - Canon 70D, 760D si 7D MKII;
  • full-time manual focus;
  • distanta minima de focus 35cm;
  • lens coating Super Spectra - aberatii cromatice, lens flare si ghosting controlate mai bine;
  • lungime 39.3mm, greutate 60g;
  • filtru de 49mm;
  • montura metalica;
  • pret de vanzare 125$. 
Graficul MTF pentru aceasta lentila:
O imagine realizata cu 50mm STM - setari F/1.8, 1/250, ISO 100, aparat foto Canon 760D:
Chiar daca la prima vedere nu pare foarte mult, ma astept la un upgrade serios fata de lentila actuala 50mm f/1.8 II (nifty fifty - lansata in decembrie 1990) si chiar 50mm F/1.4 de la Canon (lansata in iunie 1993) , ambele fiind destul de batrane si acest lucru se vede inclusiv in imaginile realizate cu ele.
In urma specificatiilor, graficului MTF si a primei imagini pot sa va spun urmatoarele lucruri:
  • sharpness bun inclusiv de la diafragma maxima - vz. imaginea atasata;
  • bokeh (imagine inafara focusului) foarte frumos - constructie diafragma din 7 elemente rotunjite;
  • control superior al aberatiilor cromatice, lens flare si ghosting-ului datorita folosirii unui lens coating superior.
In urma acestor specificatii ma astept ca lentila veche Canon 50mm f/1.8 II sa prezinte o scadere de pret si va ramane pe piata ca o solutie low-cost iar Canon 50mm f/1.4 sa fie inlocuita cu un model mai nou deoarece risca sa fie canibalizata. 
Eu unul detin doua lentile de 50mm: Sigma 50mm F/1.4 si Canon 50mm f/1.8 II.

Mai multe detalii despre aceasta lentila: http://www.usa.canon.com/cusa/consumer/products/cameras/ef_lens_lineup/ef_50mm_f_1_8_stm 

P.S.: Daca aveti un DSLR, sunteti incepator in fotografie si aveti ganduri serioase, una din primele lentile (pe langa cea de Kit) la care trebuie sa va ganditi este 50mm f/1.8.

Anuntul oficial:
MELVILLE, N.Y., May 11, 2015 – Canon U.S.A., a leader in digital imaging solutions, is proud to announce the new lightweight and compact Canon EF 50mm f/1.8 STM standard lens. Featuring a large maximum aperture of f/1.8, this single focal length lens (which has an effective focal length of 80mm when attached to an EOS camera with an APS-C sensor such as the EOS Rebel T6i) is ideal for creating portraits with beautiful, soft-blurred backgrounds. It’s also ideal for low-light photography and night scenes. Now incorporating Canon’s proprietary STM stepping motor technology, this new lens supports Canon’s EOS Movie Servo AF* (autofocus) function to provide smooth and quiet continuous AF during video recording, as well as when capturing still photos.
“Canon’s optical heritage of creating high-quality lenses is something we are very proud of ,” said Yuichi Ishizuka, president and COO of Canon U.S.A., Inc. “Regardless of skill level or budget, all photographers and videographers should have access to superb creative tools that enable them to capture not only beautiful images but images that tell the story of their lives. This new Canon EF 50mm f/1.8 STM lens, will provide photographers and videographers with outstanding images they will want to share for years to come.”
The new Canon EF 50mm f/1.8mm STM lens is excellent for entry-level and advanced amateur photographers, as well as users looking to capture video. Featuring an improved exterior design, including a new focus ring placement, it provides photographers with the most compact Canon EF 50mm lens ever, at just 1.5 inches in length. In addition, this new lens uses a metal mount providing additional stability and ruggedness compared to its predecessor.
Composed of six elements in five groups, the new Canon EF 50mm f/1.8mm STM lens features an optimized lens placement and Super Spectra Coating (SSC), translating into less ghosting and flaring than the previous model, while at the same time helping to enhance light transmission and optimize color reproduction accuracy. The new lens features a seven blade circular aperture, improved from the predecessor’s five blade non-circular aperture, helping to deliver a more visually appealing blurring effect, and producing sharp images of subjects that truly stand out against beautiful, soft backgrounds. The minimum focusing distance for the lens has been shortened to 1.1 feet from 1.5 feet with a maximum magnification of 0.21x, allowing for more creative close-up photos and videos.
Pricing and Availability
The new Canon EF 50mm f/1.8mm STM standard prime lens is scheduled to be available by the end of May for an estimated retail price of $125.99.

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